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// noncopyable.cpp
///
// (C) Copyright Eric Niebler 2004.
// Use, modification and distribution are subject to the
// Boost Software License, Version 1.0. (See accompanying file
// LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
/*
Revision history:
21 December 2005 : Initial version.
*/
#include <vector>
#include <boost/foreach.hpp>
#include <boost/noncopyable.hpp>
#include <boost/range/iterator_range.hpp>
struct noncopy_vector
: std::vector<int>
, private boost::noncopyable
{
};
struct noncopy_range
: boost::iterator_range<noncopy_vector::iterator>
, private boost::noncopyable
{
};
// Tell FOREACH that noncopy_vector and noncopy_range are non-copyable.
// NOTE: this is only necessary if
// a) your type does not inherit from boost::noncopyable, OR
// b) Boost.Config defines BOOST_BROKEN_IS_BASE_AND_DERIVED for your compiler
#ifdef BOOST_BROKEN_IS_BASE_AND_DERIVED
inline boost::mpl::true_ *boost_foreach_is_noncopyable(noncopy_vector *&, boost::foreach::tag)
{
return 0;
}
inline boost::mpl::true_ *boost_foreach_is_noncopyable(noncopy_range *&, boost::foreach::tag)
{
return 0;
}
#endif
// tell FOREACH that noncopy_range is a lightweight proxy object
inline boost::mpl::true_ *boost_foreach_is_lightweight_proxy(noncopy_range *&, boost::foreach::tag)
{
return 0;
}
///////////////////////////////////////////////////////////////////////////////
// main
//
int main( int, char*[] )
{
noncopy_vector v1;
BOOST_FOREACH( int & i, v1 ) { (void)i; }
noncopy_vector const v2;
BOOST_FOREACH( int const & j, v2 ) { (void)j; }
noncopy_range rng1;
BOOST_FOREACH( int & k, rng1 ) { (void)k; }
noncopy_range const rng2;
BOOST_FOREACH( int & l, rng2 ) { (void)l; }
return 0;
}
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